User guide

The complete circuit note of the evaluation board can be found at CN0561 Circuit Note.

Additional documentation:

• AD4134 Data Sheet

Hardware guide

Hardware configuration

Jumper settings

Jumper P10 - ASRC and SRC Mode selection

• CLOSE - ASRC Mode: DCLK and ODR pins are Inputs

• OPEN - SRC Mode: DCLK and ODR pins are Outputs

Jumpers P13 and P15 - Analog front end amplifier supply selection

• CLOSE 1-2 & OPEN 2-3: On board +15V/-15V supply

• CLOSE 2-3 & OPEN 1-2: External +15V/-15V supply from P14

Instrumentation amplifier gain settings

Gain is controlled using GPIO functionality of AD4134 which is accessible using SPI.

Configure the GPIOs as output using the GPIO_DIR_CTRL register. Use the GPIO_DATA to write high and low levels on the pins.

Gain settings are the same for the group of CH0 & CH1, and for the group of CH2 & CH3.

Figure 1 Instrumentation amplifier gain settings.

LED indicators

• DS1: Fault flag LED that glows when an input fault occurs on ADG5462F

Power supply

The EVAL-CN0561-ARDZ board can be powered through the following options:

• Arduino connectors (P1, P2, P4, P5): 3.3V supplied by the host processor board.

• P16: External power input: 9V to 12V.

• P14: External +15V/-15V supply for the analog front end.

When using an FPGA carrier with FMC connectivity (e.g., ZedBoard), the power supply comes through the FMC connector (P3), given by the FPGA.

Analog inputs

The EVAL-CN0561-ARDZ board provides the following analog input options:

• P6, P7: SMA connectors for IEPE sensor connection.

• P8, P9: Analog inputs for data acquisition.

• J6, J8: SMA connectors for analog inputs to channel 0.

• J5, J7: SMA connectors for analog inputs to channel 3.

• P11, P12: Optional connectors for analog inputs to channel 1 and 2.

To the SMA connectors, the source should be a low noise, audio precision signal (such as the Audio Precision audio analyzer).

Connectors

All connectors listed below provide extensive options for interfacing with the data acquisition board.

• P1, P2, P4, P5: Arduino connectors

• P17: Arduino Zio connector

• P3: FMCZ connector

• P6, P7: SMA connectors for IEPE sensor connection

• P8, P9: Analog inputs for data acquisition

• P16: External power input: 9V to 12V

• P14: External +15V/-15V supply for analog front end

• J6, J8: SMA connectors for analog inputs to channel 0

• J5, J7: SMA connectors for analog inputs to channel 3

• P11, P12: Optional connectors for analog inputs to channel 1 and 2

Arduino pin assignments

Figure 2 EVAL-CN0561-ARDZ Arduino pin assignments.

Host processor connector

• Arduino and Zio Connectors: P1, P2, P4, P5 & P17. These connect to 3.3V Arduino boards.

Test points

Figure 3 EVAL-CN0561-ARDZ test points.

Data acquisition performance (SPI clock and sample rate)

The system is designed to acquire data from the ADC device, supporting continuous data capture at a maximum 1.5 MSPS data rate. However, due to a hardware limitation, the Cora Z7S variant will only support a maximum data clock of 24 MHz, in contrast with 50 MHz supported on the ZedBoard.

Schematic, PCB Layout, Bill of Materials

Download

EVAL-CN0561-ARDZ Design & Integration Files

• Schematics

• PCB Layout

• Bill of Materials

Software guide

The evaluation board is supported with the Libiio library. This library is cross-platform (Windows, Linux, Mac) with language bindings for C, C#, Python, MATLAB, and others. Two easy examples that can be used with it are:

• IIO Oscilloscope

• Analog Devices Hardware Python Interfaces

Precision Converters firmware

For use with standalone microcontroller platforms, the Precision Converters firmware build guide is available at:

• AD4134 IIO Application